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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
// <string_view>
// constexpr bool starts_with(charT x) const noexcept;
#include <string_view>
#include <cassert>
#include "test_macros.h"
#include "constexpr_char_traits.h"
int main(int, char**)
{
{
typedef std::string_view SV;
SV sv1 {};
SV sv2 { "abcde", 5 };
ASSERT_NOEXCEPT(sv1.starts_with('e'));
assert (!sv1.starts_with('a'));
assert (!sv1.starts_with('x'));
assert ( sv2.starts_with('a'));
assert (!sv2.starts_with('x'));
}
#if TEST_STD_VER > 11
{
typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
constexpr SV sv1 {};
constexpr SV sv2 { "abcde", 5 };
static_assert (!sv1.starts_with('a'), "" );
static_assert (!sv1.starts_with('x'), "" );
static_assert ( sv2.starts_with('a'), "" );
static_assert (!sv2.starts_with('x'), "" );
}
#endif
return 0;
}
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